#include <57header.h>

void fun2(int num){
    printf("fun2 sleep before \n");
    sleep(10);
    printf("fun2 sleep over \n");
}
void fun3(int num){
    printf("fun3 sleep before \n");
    sleep(10);
    printf("fun3 sleep over \n");
}
int main(int argc,char*argv[])
{

    signal(2, fun2);
    signal(3, fun3);

    while(1);
    return 0;
}

